阶层结构电极的合理设计,以抑制Redox增强超级电容器中的穿扩散
Xiaofei Miao1,2, Jingye Chen1, Chenyang Zhong1
1College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China.
ACS applied materials & interfaces
|December 4, 2024
概括
研究人员开发了一种分层电极,以防止超级电容器中的氧化还原穿扩散. 这种简单的三层设计有效地限制了氧化还原介质,提高了储能设备的稳定性和寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氧化对增强了超级电容器的能量密度,但受到穿扩散的影响.
- 缺乏一种普遍的策略来抑制氧化还原穿扩散.
- 这给开发稳定,高性能超级电容器带来了重大挑战.
研究的目的:
- 设计和制造一个等级结构电极用于氧化还原增强超级电容器.
- 开发一种简单,有效和通用的方法来抑制穿扩散.
- 为了评估电极在限制各种氧化还原介质方面的性能.
主要方法:
- 在碳上制造一个三功能层层次的层次电极 (导电,存储,封闭).
- 在三个简单的步骤中进行大规模合成.
- 使用三种不同的氧化还原介质进行测试: antraquinone (AQ), naphthoquinone (NQ) 和 p-benzoquinone (PQ).
主要成果:
- 层次电极表现出极好的导电性,吸附性和封闭性.
- 在5000个循环后,对AQ,NQ和PQ显著抑制穿扩散,CV峰电流衰减率低 (5.64%,3.54%,10.34%).
- 与普通电极相比,穿扩散被更有效地限制.
- 软包超级电容器在5000个循环后保持了86.6%的电容.
结论:
- 层次的电极设计有效地抑制了氧化还原穿扩散.
- 该电极显示出作为氧化还原增强超级电容器的通用解决方案的巨大潜力.
- 这种方法为储能设备提供了更高的稳定性和寿命.
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